What does TNM M1 mean?

What does TNM M1 mean?

• A. Distant metastasis present.
• B. Metastasis confined to the regional lymph nodes.
• C. No distant metastasis.
• D. Metastasis to the liver only.

Answer: (A)

The main concept is that M1 indicates distant metastasis. In the TNM system, M denotes whether cancer has spread to distant organs or tissues beyond the primary tumor and regional lymph nodes. M1 means such distant spread is present, meaning the cancer has metastasized to far sites like the liver, lungs, bone, or brain. If there’s no distant spread, that’s M0. A statement about metastasis limited to regional lymph nodes describes the N category, not M. Saying metastasis to the liver is a specific example of distant metastasis and would still fit M1.

The main concept is that M1 indicates distant metastasis. In the TNM system, M denotes whether cancer has spread to distant organs or tissues beyond the primary tumor and regional lymph nodes. M1 means such distant spread is present, meaning the cancer has metastasized to far sites like the liver, lungs, bone, or brain. If there’s no distant spread, that’s M0. A statement about metastasis limited to regional lymph nodes describes the N category, not M. Saying metastasis to the liver is a specific example of distant metastasis and would still fit M1.